The NSDAP general is bound by the duty to his office, the duty to his state, and the duty to his sovereign. If such a man is swayed to ignore the clear procedures of his juridical system by mere conversation over tea, then the entire sociopolitical system is subverted. Such situation and behavior are the very definition of corruption. Men bound to duty do not discharge the obligations of their office based on mere whim and feelings, which you seem to suggest in the example above. Stable society cannot exist, if men in office are as unprincipled and whimsical as you suggest.
The peace, which you desire, does not arise from nebulous principles ineffectually enforced by corrupt government officers acting on mere whimsy. Peace exists only in stable sociopolitical systems, which arise from immutable and absolute principles that are implacably enforced by principled men. Much of modern societal problems arise from increasing penchant towards relativism and nihilism. Absolute principles and standards must guide men in their behaviors, if they are to live within a civil society, not nebulous and useless feelings and consensus that only corrupt and undermine civil order.
RE: Ethical ramifications of, The PRIME-DIRECTIVE